Geitlerinema (Anagnostidis & Komárek) Anagnostidis, 1989

Holotype species: Geitlerinema splendidum (Gomont) Anagnostidis

Original publication and holotype designation: Anagnostidis, K. (1989). Geitlerinema, a new genus of oscillatorialean cyanophytes. Plant Systematics and Evolution 164(1): 33-46, 4 figures, 1 table.

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Description: Thallus thin, delicate, mostly bright blue–green, diffluent, sometimes fascicle–like, usually forming thin mats; occasionally isolated trichomes. Sheaths absent. Trichomes ± parallel–arranged, cylindrical, straight, slightly flexuous, not constricted at the cross–walls, bent and spherically capitate at the ends, motile, with intense gliding in the direction of the longitudinal axis, sometimes accompanied by a distinctive rotation, 1.5–3 µm wide. Cells rarely short, up to 2–4(6) × longer than wide, 3.5–8 µm long, pale grayish, blue–green or bright blue–green, without evident chromatoplasma or centroplasma, sometimes with translucent cyanophycin granules at the cross–walls, without aerotopes. Apical cells in developed trichomes bent or/and apparently spherical–capitate. Thylakoids concentrically arranged, peripheral and more or less parallel to the longitudinal cell walls, forming a wavy concentric inner cylinder. Centroplasma includes droplets of polyphosphates, starch and carboxysomes (Fig. 3, A–D). The main diacritic features are trichomes lacking sheaths and particularly the morphology of the end cells that are bent, sphe-rically capitate, and elongated up to 15 µm when mature. Reproduction by disintegration of trichomes into motile hormogonia, without necridic cells.

Information contributed by: Strunecky et al. 2017. The most recent alteration to this page was made on 2023-03-03 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

Gender: This genus name is currently treated as neuter.

Most recent taxonomic treatment adopted: Strunecký, O., Ivanova, A.P. & Mares, J. (2022 '2023'). An updated classification of cyanobacterial orders and families based on phylogenomic and polyphasic analysis (Review). Journal of Phycology 59(1): 12-51.

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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.

Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 03 March 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 27 February 2024

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